The world's biggest advertising company says Google is now its biggest partner - and it spent $2.9 billion on Google ads last year

Lara O'ReillyMar 9, 2015, 10.23 PM

WPPWPP chief executive Sir Martin Sorrell.

WPP, the world's largest advertising company, has just revealed Google is its biggest partner, in terms of where it plugs its clients' advertising money. And it's WPP's biggest media partner by quite some way.